Hello @austinj_baker
Self Employment tax has an average of 25 to 30% of the income.
The income is after your business expenses:
Income earned - Expenses (for the line of work) = Taxable income.
Please refer to these links for more detailed information form the IRS and your State.
https://www.irs.gov/businesses/small-businesses-self-employed/income-tax-withholding-assistant-for-e...
https://dor.mo.gov/forms/index.php?formName=withholding+tax+table+-+all&category=&year=&searchForms=...
